/Engine/Source/Runtime/CoreUObject/Public/Misc/PackagePath.h
Does not handle InPackageNames that are actually LocalPaths; use TryFromMountedName if you need to handle either PackageName or LocalPath Fails and returns false if and only if InPackageName is not a valid LongPackageName (/Root/Folder/File) Will be converted to a MountedPath when the LocalPath is required; if the package is not mounted at that point the LocalPath will be empty
True if InPackageName is valid, else false
static bool TryFromPackageName ( [FName](API\Runtime\Core\UObject\FName) InPackageName, [FPackagePath](API\Runtime\CoreUObject\Misc\FPackagePath) & OutPackagePath )